[CQ-Contest] To cut or not to cut?

[Bob Naumann]

Pete,

I think that in serial numbers, the only digit that should be cut is a
leading zero.

For example, when I send 020 (twenty) I would send T 2 0 - not T 2 T.

I think doing anything else runs the risk of confusion and could require
fills either slowing things down or causing a lost qso for the receiving
station.

The additional transmission time to send full digits pales in comparison to
resending a miscopied exchange.

73,

Bob W5OV
-----Original Message-----
From: cq-contest-bounces at contesting.com
[mailto:cq-contest-bounces at contesting.com] On Behalf Of Pete Smith N4ZR
Sent: Thursday, May 31, 2012 7:23 AM
To: CQ Contest
Subject: [CQ-Contest] To cut or not to cut?

There's nothing like a CW serial number contest to get you re-thinking 
about the use of cut numbers.

For situations where first-time intelligibility is important, I think 
use of cut numbers probably costs more time than it saves.  Here's why:

The basic Morse Code 0-9 character set has two important characteristics 
- each number is five code elements long, and each one gives you two 
chances to copy correctly or confirm that you have done so. If you hear 
the first dit of 1, or the last 4 dahs, then you know what the number 
is.  This is because, with the regularity of computer-sent CW and the 
presence of "5NN" as a signal to expect the number to begin at a certain 
time, you can often infer from the length of the "lost" portion of a 
number what it must have been.  Even if you only get the two dits of 8, 
depending on when you hear them, you can have pretty good confidence 
that it was, in fact, 8, and not seven with one unheard dit.

How much time is saved by sending A instead of 1?  How much time is lost 
by responding to "AGN" or "NR?"

Opinions?  I bet there are a few out there.

-- 
73, Pete N4ZR
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